1.  Appealing to individuals to make better choices with regard to diet and exercise.  This continues to be important but this alone is insufficient as the evidence to date has clearly demonstrated. 

2. Appealing to corporate conscience of the food industry – for example to reduce sugar.  While some big players may be persuaded, other competitors jump into the void.

3.  Relying on regulators.  This is impactful but due to a combination of lack of political will or failures of policy it is insufficient.

This may even cure diabetes and other chronic health problems but new disease are likely to crop up  and we’ll still not impact well-being and happiness unless we create the conditions whereby people are living healthier (through diet/exercise/sleep, etc). 

Climate change, finance, education, worker’s rights, poverty, animal welfare, corruption and many others.